Dear experts,
We are trying to connect an osmocom platform to an Ericsson platform, and are trying to
make funtional 2G.
We use a VM for OSMO-BSC, a VM for OSMO-BTS-TRX + OSMO-PCU, and a Raspberry PI (trx-lms)
Concerning the Gb, we connected the OSMO-PCU to an MKX Ericsson, and we have an error at
the NS setup step.
The communication between the SGSN Ericsson and the OSMO-PCU seems ok (IP / routing OK)
We hope that the Ericsson MKX SGSN is well configured.
We can see some packets: OSMO-PCU ---> SGSN : NS_RESET, Cause: P&M
intervention, NS VCI: 0x1388, NSEI: 5000
and a response from the SGSN: NS_STATUS, Cause PROTOCOL ERROR - unspecified.
What could be the problem ? timers ? ns-vci, nsvc 1, encapsulation,...
Did someone test this: OSMOCOM with an ERICSSON SGSN ?
One point is that the nsvci is only defined on the BSC (not on the SGSN)
Many thanks in advance,
Best regards
Hoping that you could help us
Jean-Marc
-----------------------
BSC CONFIGURATION
-----------------------
bts 0
type osmo-bts
description LimeSDR Based BTS
band GSM900
cell_identity 41023
location_area_code 390
base_station_id_code 63
ms max power 15
cell reselection hysteresis 4
rxlev access min 0
radio-link-timeout 32
channel allocator mode chan-req ascending
channel allocator mode assignment ascending
channel allocator mode handover ascending
channel allocator mode vgcs-vbs ascending
rach tx integer 9
rach max transmission 7
rach max-delay 63
channel-description attach 1
channel-description bs-pa-mfrms 5
channel-description bs-ag-blks-res 1
no nch-position
no access-control-class-ramping
early-classmark-sending forbidden
early-classmark-sending-3g allowed
ipa unit-id 901 0
oml ipa stream-id 255 line 0
neighbor-list mode automatic
codec-support fr
gprs ns timer tns-block 3
gprs ns timer tns-block-retries 3
gprs ns timer tns-reset 3
gprs ns timer tns-reset-retries 3
gprs ns timer tns-test 30
gprs ns timer tns-alive 3
gprs ns timer tns-alive-retries 10
gprs nsei 5000
gprs nsvc 0 nsvci 5000
gprs nsvc 0 local udp port 23001
gprs nsvc 0 remote ip 172.20.168.220
gprs nsvc 0 remote udp port 2157
...
-----------------------
PCU CONFIGURATION
-----------------------
ns
timer tns-block 3
timer tns-block-retries 3
timer tns-reset 3
timer tns-reset-retries 3
timer tns-test 30
timer tns-alive 3
timer tns-alive-retries 10
timer tsns-prov 3
timer tsns-size-retries 3
timer tsns-config-retries 3
timer tsns-procedures-retries 3
pcu
flow-control-interval 10
cs 2
cs max 4
cs threshold 10 33
cs downgrade-threshold 200
cs link-quality-ranges cs1 6 cs2 5 8 cs3 7 13 cs4 12
mcs link-quality-ranges mcs1 6 mcs2 5 8 mcs3 7 13 mcs4 12 15 mcs5 14 17 mcs6 16 18 mcs7
17 20 mcs8 19 24 mcs9 23
mcs max 9
window-size 64 0
queue idle-ack-delay 10
queue codel